244 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



species mainly in the somewhat more robust form; larger and 

 more prominent eyes; broader and differently shaped lateral 

 iobes of the pronotum; immaculate abdomen, the distal half of 

 which in males of cinereus is uniform and striking yellow in life 

 (in various specimens varying in shade from cadmium to capu- 

 cine yellow), and in the male cerci being more elongate with the 

 distal portion decidedly depressed and lateral margins of same 

 distinctly converging (this more noticeable as the distal portion 

 is decidedly more elongate than in fasciatus) , and with the apex 

 more narrowly but still broadly rounded. The male cerci are con- 

 colorous with the distal portion of the abdomen in this species; 

 in fasciatus they are green unless discolored in drying. 



Vertex not strongly but distinctly ascending. Fastigium of 

 vertex normally about two-thirds, varying occasionally from less 

 than two-thirds to fully the width of the proximal antennal joint, 

 narrowing with a distinct but very weak concavity to facial 

 suture, when seen from front about one and one-half times as 

 deep as greatest width. Eyes moderately large and prominent. 

 Lateral lobes of pronotum broader than in fasciatus, cephalic mar- 

 gin moderately oblique and nearly straight to the broadly rounded 

 obtuse-angulate ventro-cephalic angle, thence nearly straight to 

 the sharply rounded ventro-caudal angle which is distinctly less 

 than ninety degrees, caudal margin weakly sinuous, nearly 

 straight to the shallow humeral sinus, convex callosity very nar- 

 row. Tegmina macropterous, varying to a semi-brachypterous 

 condition in all large series from various portions of the range of 

 the species, apex of tegmina always sharply rounded. Male cerci 

 as described above. The genicular lobes of the caudal femora are 

 normally bispinose^'^; the genicular areas are not darkened; but 

 sixteen of a series of over one hundred perfect specimens before us 

 have the ventro-external margins of the caudal femora armed as 

 follows: 



Number of spines, 0-1 0-2 1-1 1-2 2-2 2-3 



Number of specimens," 6 16 111 



3^ As in almost all of the species showing this condition, rare individuals are 

 found having one, two or three of these lobes unispinose, and very rarely this 

 is tnie for all four of the genicular lobes of the caudal femoru. In species 

 having these lobes normally unispinose, a bispinose condition of even one or 

 two of the lobes is very rarely found. 



''From the Bahamas, one" .Jamaica, five; Costa Rica, one; Panama, one; 

 Venezuela, one; FlViich (!uian;i, two; Peru, five (of six before us.)- 



